/* public/assets/css/style.css */
:root {
  /* Paleta Dark Contemporary / Editorial */
  --bg-color: #050608; /* Casi negro absoluto */
  --surface-color: #11141A;
  --surface-hover: #181c25;
  --border-color: #2A2F3D;
  
  /* Textos */
  --text-main: #F3F4F6; /* Blanco roto */
  --text-muted: #9CA3AF;
  --text-accent: #E5E7EB;
  
  /* Identidad */
  --primary: #6366F1; /* Índigo vibrante */
  --primary-hover: #4F46E5;
  --secondary: #06B6D4; /* Cian eléctrico */
  --secondary-muted: rgba(6, 182, 212, 0.15);
  
  /* Feedback */
  --error: #EF4444;
  --success: #10B981;
  
  /* Utilities */
  --focus-ring: rgba(99, 102, 241, 0.5);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  
  /* Espaciado Grid (Modular Scale) */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2.5rem;
  --space-lg: 5rem;
  --space-xl: 8rem;
}

/* Base Styles */
* { box-sizing: border-box; }

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography Editorial */
h1, h2, h3, h4, h5 {
  margin: 0;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-accent);
}

p {
  margin-top: 0;
  margin-bottom: var(--space-sm);
  font-size: 1.125rem;
}

a {
  color: var(--secondary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover, a:focus-visible {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Layout - Mobile First Adaptable */
.container {
  width: 100%;
  padding: 0 1.5rem;
  margin: 0 auto;
}

.max-w-reading { max-width: 800px; margin-left: auto; margin-right: auto; }
.max-w-screen { max-width: 1280px; margin-left: auto; margin-right: auto; }

/* Identidad Visual Header */
.header-main {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) 0;
}

.brand-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo-svg {
  color: var(--primary);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-wordmark {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text-main);
  line-height: 1;
}

.brand-descriptor {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
  font-weight: 600;
}

/* Hero Section */
.hero {
  padding: var(--space-md) 0 var(--space-xl) 0;
  display: flex;
  flex-direction: column;
}

.hero-tag {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--secondary);
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero-title {
  font-size: clamp(3rem, 10vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.05em;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  max-width: 900px;
}

.hero-subtitle {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  color: var(--text-muted);
  font-weight: 400;
  max-width: 800px;
  line-height: 1.4;
  margin-bottom: var(--space-md);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
}

/* Secciones Conceptuales */
.section-pad {
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border-color);
}

.section-pad-no-border {
  padding: var(--space-lg) 0;
}

.section-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 1rem;
  display: block;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-md);
}

.section-title-sm {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  margin-bottom: var(--space-sm);
  line-height: 1.2;
}

.section-subtitle {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-accent);
}

/* Grids Editoriales */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}
@media (min-width: 768px) {
  .grid-2 { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}
@media (min-width: 600px) {
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Tarjetas de Información */
.info-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  height: 100%;
}

.info-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--text-accent);
}

.info-card p {
  font-size: 1rem;
  color: var(--text-muted);
  margin: 0;
}

.info-card-number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--secondary-muted);
  margin-bottom: 1rem;
  display: block;
}

/* Transformation Pathway */
.pathway {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: var(--space-md);
}

@media (min-width: 768px) {
  .pathway {
    flex-direction: row;
    align-items: flex-start;
  }
}

.path-step {
  flex: 1;
  position: relative;
}

.path-arrow {
  color: var(--primary);
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .path-arrow {
    position: absolute;
    right: -1rem;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
  }
  .path-step:last-child .path-arrow { display: none; }
}

.path-step h4 {
  font-size: 1.125rem;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}
.path-step p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Botones y CTA */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 1.25rem 2rem;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1;
}

.btn:hover, .btn:focus-visible {
  background-color: var(--primary-hover);
  outline: none;
}

.btn:focus-visible {
  box-shadow: 0 0 0 4px var(--bg-color), 0 0 0 6px var(--primary);
}

.btn-secondary {
  background-color: var(--surface-color);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}
.btn-secondary:hover {
  background-color: var(--surface-hover);
  border-color: var(--text-muted);
}

.btn-large {
  font-size: 1.25rem;
  padding: 1.5rem 3rem;
  border-radius: var(--radius-md);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (min-width: 600px) {
  .btn { width: auto; }
}

/* Trust Indicators */
.trust-indicators {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

@media (min-width: 600px) {
  .trust-indicators {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 2rem;
  }
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.trust-item svg {
  color: var(--secondary);
}

/* Formularios de Radiografía */
.form-step {
  background: transparent;
  padding: 0;
  margin-bottom: var(--space-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 800;
  margin-bottom: var(--space-sm);
  color: var(--text-main);
  line-height: 1.2;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 1.5rem;
  background-color: var(--surface-color);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  border-radius: var(--radius-md);
  font-size: 1.125rem;
  font-family: inherit;
  transition: all 0.2s;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  background-color: var(--surface-hover);
}

/* Opciones Táctiles Gigantes */
.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.option-label {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  background-color: var(--surface-color);
  transition: all 0.2s;
  font-size: 1.125rem;
  font-weight: 600;
}

.option-label:hover {
  background-color: var(--surface-hover);
  border-color: var(--text-muted);
}

.option-label input {
  margin: 0 1rem 0 0;
  width: 1.5rem;
  height: 1.5rem;
  accent-color: var(--primary);
  flex-shrink: 0;
}

/* Estado Activo CSS Puro via :has() */
.option-label:has(input:checked) {
  border-color: var(--primary);
  background-color: rgba(99, 102, 241, 0.08);
}

.error-text {
  color: var(--error);
  font-size: 1rem;
  margin-top: 0.75rem;
  display: none;
  font-weight: 600;
}
.has-error .error-text { display: block; }
.has-error .form-input, .has-error .form-textarea, .has-error .option-label {
  border-color: var(--error);
}

/* Progress bar rediseñada */
.progress-wrapper {
  margin-bottom: var(--space-lg);
}

.progress-text {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.progress-container {
  width: 100%;
  height: 4px;
  background-color: var(--border-color);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--primary);
  width: 0%;
  transition: width 0.4s ease-out;
}

/* Utilidades */
.hidden { display: none !important; }
.hp-field { position: absolute; left: -9999px; opacity: 0; }
.help-text { font-size: 1rem; color: var(--text-muted); margin-bottom: 1.5rem; display: block; line-height: 1.5; }

/* Navegación dentro del formulario */
.nav-buttons {
  display: flex;
  flex-direction: column-reverse;
  gap: 1rem;
  margin-top: var(--space-lg);
}

@media (min-width: 600px) {
  .nav-buttons {
    flex-direction: row;
    justify-content: flex-end;
  }
}

/* Accesibilidad & Reducción de movimiento */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}